摘要
气体谱线参数的准确性对于应用可调谐半导体激光吸收光谱技术(TDLAS)开展燃烧流场参数的精确测量十分重要。针对目前谱线数据库参数在高温高压环境的不确定性,以主要燃烧产物CO_(2)作为目标气体,开展了CO_(2)高温高压谱线参数测量研究。设计了耐高温高压气室,在三段管式炉上搭建了一套气体谱线参数高温高压校准装置,以分布反馈式(DFB)半导体激光器作为光源,对中心频率4 988.655 cm-1的CO_(2)吸收光谱进行了测量,获得了373~673 K温度范围内,1~3 atm多个压强下的纯CO_(2)高温高压吸收光谱,经过Voigt线型拟合等数据处理,得到了线强、自展宽系数、温度指数等谱线参数,与HITRAN2016数据库对应的参数进行对比,线强相对误差在-8.6%~-2.4%,线强不确定度约为4.1%,自展宽系数相对误差在-8.8%~2.1%,所测数据对现有的谱线数据库起到了修正和补充。
The accuracy of gas spectral line parameters is very important for the accurate combustion flow parameter measurement using tunable diode laser absorption spectroscopy (TDLAS) technology.In view of the uncertainty of current spectral line database parameters in high temperature and high pressure environment,the measurement study of CO_(2) spectral line parameters at high temperature and high pressure is carried out by taking combustion product gas CO_(2) as target gas.A high temperature and high pressure resistant gas chamber was designed,and a set of high temperature and high pressure calibration device for gas spectral parameters was built on a three-stage tubular furnace.A distributed feedback(DFB)semiconductor laser is used as the light source to measure the CO_(2) absorption spectrum at 4 988.655 cm-1,and the pure CO_(2) high temperature and high pressure absorption spectrum is obtained in the temperature range of 373~673 K and the pressure range of 1~3 atm.After data processing such as Voigt line fitting,spectral line parameters such as line intensity,self-broadening coefficient and temperature-dependence exponent are obtained.In comparison with the parameters corresponding to those of HITRAN2016database,the relative errors of line intensity are-8.6%~-2.4%,its uncertainty is about 4.1%,and the relative errors of selfbroadening coefficient are-8.8%~2.1%.The measured data can revise and supplement the existing spectral line database.
作者
许江文
王学影
常海涛
蔡静
梅园园
江文松
XU Jiangwen;WANG Xueying;CHANG Haitao;CAI Jing;MEI Yuanyuan;JIANG Wensong(College of Metrology&Measurement Engineering,China Jiliang University,Hangzhou 310018,China;Thermal Division,AVIC Changcheng Institute of Metrology&Measurement,Beijing 100095,China)
出处
《现代电子技术》
2023年第5期104-108,共5页
Modern Electronics Technique
基金
国家自然科学基金项目(52075511)
浙江省科技计划项目(2021C01136)
浙江省公益性技术应用研究计划(LGG21E050019)。
关键词
谱线参数测量
TDLAS
耐高温高压气室
参数校准
数据处理
CO_(2)吸收光谱测量
实验装置
spectral line parameter measurement
TDLAS
high-temperature high-pressure resistant gas chamber
parameter correction
data processing
CO_(2)absorption spectrum measurement
experimental facility
